Grooved-End Rubber Expansion Joint with 4-Way Compression Grooved Coupling

A grooved-ended resilient pipe expansion joint and pipe coupling combination, comprising:

• the expansion joint comprising a resilient expansion member having a central resilient portion and two resilient axially disposed cylindrical ends;
• each of the cylindrical ends having a radially outwardly raised distal cylindrical gasket portion with at least one inside shoulder having an inner diameter sized the same as an outer diameter of an end groove of a pair of grooved ended pipes, the grooved ended pipes mechanically coupled into the resilient expansion joint;
• each of the cylindrical ends further comprising a neck portion between the central resilient portion and the radially outwardly raised distal cylindrical gasket portion the neck portion having an outer diameter the same as an inner diameter of a grooved pipe nipple;
• and
• the pipe coupling configured to engage one of the pair of grooved ended pipes and the grooved pipe nipple, the coupling further comprising upper and lower arcuate housing segments and left and right bridge segments disposed between the upper and lower arcuate housing segments, each bridge segment having at least first and second sets of dihedrally angled faces that engage corresponding faces each in the upper and lower arcuate housing segments such that drawing the upper and lower arcuate housing segments inwardly together along a first axis presses each bridge segment inward along a second axis tangential to the first axis, wherein the first set of dihedrally angled faces have a line of intersection with the second set of dihedrally angled faces.